BMW part number 34411112567 is a classic parking brake roll pin / spiral pin (28mm) used inside the rear drum brake assembly (or the drum-in-hat style emergency brake on rear disc brake models). It is responsible for holding down the parking brake shoes against the backing plate. (Note: This original part number has been superseded over time by newer versions—most recently 34406794950—but the underlying vehicle fitment remains identical). Part is NLA through the dealer.
This is the Parking Brake Pin without the Compression Spring being integrated into it. The distinction between these two setups comes down to a design change BMW made mid-generation:
1. Separate Pin and Spring (Older Design)
- Pin Part Number: 34411112567 (L=28mm spiral roll pin)-the part being sold here
- Spring Part Number: 34411100122
- How it works: This is a two-piece system. You slide the bare metal pin through the rear backing plate and the brake shoe, drop the compression spring over it, and twist a retaining cap onto the top of the pin to lock it down.
2. Integrated "Pin with Compression Spring" (Newer Design)
- Part Number: 34411100640 (often called an expanding lock pin)
- How it works: On later models (and updated parts catalogs), BMW replaced the loose pin and separate spring with a single, integrated assembly. The spring is permanently captive on the pin body, allowing you to push and twist the entire unit into the backing plate in one step.
If you are replacing old hardware and want to keep the original, separate style setup, ordering 34411112567 gives you the bare metal 28mm spiral pin entirely on its own.
- 3 Series (E21 Generation) — 1978–1983
- 323i (European market models featuring rear disc brakes)
- 3 Series (E30 Generation) — 1984–1993
- 318i / 318is
- 325 / 325e / 325es
- 325i / 325is / 325ix
- (Note: Fits all standard E30 models; it typically does not apply to the E30 M3 which used unique rear brake backing hardware)
- 6 Series (E24 Generation) — 1978–1989
- 633CSi / 635CSi
- E24 M6 / M635CSi
- 7 Series (E23 Generation) — 1978–1987
- 733i / 735i
- 728i (European market models)
